Hand-drill



H. H. ,PACKER.

Ratchet Drill. v

' Patentedlhlne 29, 1858.

UNITED STATES PATNT QFFICE.

HENRY H. PACKER, OF BOSTON, MASSACHUSETTS.

HAND-DRILL.

Specification forming part of Letters Patent No. 20,728, dated June 29',1858; Reissued January 2,

I To all whom it may concern Be it known that I, HENRY H. PAOKER, ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented a new and useful hand ratchet-drill machine for the purpose ofdrilling or boring holes in metallic or other substances in the processof constructing and erecting machinery and other mechanical purposeswhere it is not convenient to use the power-drill machine; and I dohereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the accompanying drawings, making a part of thisspecification.

The nature of my invention consists in certain improvements in ratchethand drills as hereinafter fully described.

To enable those skilled in the art to make and use my invention I willproceed to de scribe its construct-ion and operation, referring byletter to the accompanying drawings, wherein Figure 1, represents anelevation of my improved drill; Fig. 2, a vertical section through thecenter, and Fig. 3, a horizontal section on the line 00, a", Fig. 1.

Similar letters denoting the same parts in the different views.

C, represents the screw barrel the upper end of which is bored out andtaped, to accommodate the screw, B, the lower end being so constructedas to have formed therein a socket for the reception of a drill (seeFig. 2) represented at, (Z. The head of the screw, B, is conical on topas seen at A, forming a pivot and has projecting from its perimetersdownward a shell, A, which (when the screw, B, is at its lowest point inthe barrel, C,) entirely surrounds said barrel, its whole length.

C, is a ratchet wheel which is keyed into the lower end of the barrel ordrill stock, G, and rotates in an eye on slot formed in the spindlestock, 6, for its reception; said ratchet wheel is caused torevolvecarrying with it the barrel, C, screw, B, and shell, A,

and any tool which may be secured in the shank at, d, at every halfstroke, or, every other, vibration of the spindle stock, I), by means ofthe pawl, 9, working on a pivot, 2', and kept in gear with said wheel(at the proper times) by a special spring, 6. The frame or stock, Z), isfurnished with a suitable handle, 7, on the top of the stock, I), andsurrounding the band, A, is a collar, a, from which extends upward ashell, m, surrounding the shell A, the greater partof its length.

The operation of my improved drill is nearly similar to those already inuse and requires but little explanation, the whole mechanism is causedto partially rotate at every forward stroke or vibration of the handle,f, by means as already described, while at every backward stroke thepawl, g, rides over the ratchet wheel, a, leaving the mechanismstationary; when itis desired to feed the drill the screw, B, is turnedby a simple key or lever fitting a hole in its head, A.

It will be observed then by virtue of the peculiar construction of thedrill with shells A, and, m, that the screw barrel, C, with its internalscrew thread, and the male screw B, are effectually protected from alldust or other injurious matter; which is a great desideratum; theseportions of the machine being those which first give away generally inconsequence of the dust which gets in the threads of these screwsgrinding them away and thus rendering them inoperative.

Having described the construction and op eration of my improvement whatI claim therein as new and desire to secure by Letters Patent is:

The combination of the cylindrical shells A and, m, with the feed screwand screw barrel; substantially as and for the purpose specified.

HENRY H. PACKER. Witnesses:

CHARLES HEALEY, JosnPH GREEK, Junr.

[Fms'r PRINTED 1911.]

